[橋手Qiáo shǒu] A general term for the attack and defense techniques of the forearm 

Jiang YuShan & Master Daverne - The term "Chinese Bridge Hand Kung Fu" likely refers to a martial arts technique that involves using the arms as a "bridge" for interacting with an opponent. During this interaction, the practitioner transfers force or energy to the opponent, possibly incorporating the concept of "power originating from the root joints."
In many Chinese martial arts, the effective use of the arms is indeed crucial. Practitioners learn how to use arm movements, positions, and angles to block, counter, or attack an opponent. The concept of "power originating from the root joints" emphasizes the continuity of the body's structure and suggests that power isn't solely derived from muscle strength, but also involves utilizing the body's structure and energy.
Different martial arts styles and schools may have their own ways of practicing and interpreting these techniques and concepts. Understanding the body's structure, fluidity of movement, and the application of power are all essential in martial arts. This kind of skill requires consistent training and practice to effectively apply in actual combat or demonstrations. By using proper posture, movements, and energy transmission, martial artists can maximize their skills and gain an advantage in interactions with opponents.
As mentioned, various martial arts styles and schools may have different approaches to the practice and understanding of "Chinese Bridge Hand Kung Fu." If you're interested in a specific martial arts style or more in-depth details about these techniques, I recommend seeking out professional instructors, scholars, or resources in that field to gain more detailed guidance and information.